Opener Lab
Compare BASIS
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How BASIS performs
Played first, BASIS removes about 89.5% of the possible-answer list on average and scores 4.05 bits of information. Roughly 29% of the time at least one letter lands in the right spot.
Tried against 1,859 past Wordle answers, BASIS left an average of 253 possible answers standing after the first guess. Its largest group in that replay came on July 19, 2026, when the answer was CHURN and 543 candidates survived. It has been the daily answer once.
First-guess odds
| Outcome | BASIS |
|---|---|
| First-turn solve* | 0.04% |
| At least one green | 28.6% |
| Any green or yellow | 77.0% |
| Whole row gray | 23.0% |
| Worst case answers left | 543 |
*Treating every word in the possible-answer list as equally likely.